Diagnostic Test for Placement
Diagnostic Test for Level 2 [AP Plus&Local]
Diagnostic Test for Level 2 [AP Plus&Local]
Diagnostic Test for Level 2 [AP Plus&Local]
- Check your readiness for Level 2 Class by clicking the picture above (passcode: DChO2026) to complete 40 Multiple-Choice Questions in a consecutive 60 minutes.
- Email Dr. Chen (chen@dcho.us) for results and recommended placement.
- Level 2 class is designed for motivated students who will take AP Chemistry or equivalence in the fall concurrently to prepare for the USNCO Local Exam 2026.
Diagnostic Test Level 3 [Post-AP&National]
Diagnostic Test for Level 2 [AP Plus&Local]
Diagnostic Test for Level 2 [AP Plus&Local]
- Check your readiness for Level 3 Class by clicking the picture above (passcode: DChO2026) to complete 60 Multiple-Choice Questions in a consecutive 60 minutes.
- Email Dr. Chen (chen@dcho.us) for results and recommended placement.
- Level 3 class is designed for students with a 4 or 5 in the AP Exam (or equivalence) or scored 35+ in the Local 2025, to prepare for the USNCO National Exam 2026.
Diagnostic Test for Level 4 [High Honor&Camp]
Diagnostic Test for Level 4 Module 3 [Advanced Organic Chemistry]
Diagnostic Test for Level 4 Module 3 [Advanced Organic Chemistry]
- Check your readiness for Level 4 Class by clicking the picture above (passcode: DChO2026) to complete 30 Multiple-Choice Questions in a consecutive 50 minutes.
- Email Dr. Chen (chen@dcho.us) for results and recommended placement.
- Level 4 class is designed for students who scored 35+ in the National 2025 Part I, to aim for High Honor & Camp in the USNCO National Exam 2026.
Diagnostic Test for Level 4 Module 3 [Advanced Organic Chemistry]
Diagnostic Test for Level 4 Module 3 [Advanced Organic Chemistry]
Diagnostic Test for Level 4 Module 3 [Advanced Organic Chemistry]
- Check your readiness for Level 4 Module 3 Class by clicking the picture above (passcode: DChO2026) to complete 40 Multiple-Choice Questions in a consecutive 60 minutes.
- Email Dr. Chen (chen@dcho.us) for results and recommended placement.
- Level 4 Module 3 class is designed for students who completed Organic Chemistry 1 or equivalence (around first 10 chapters until Chemistry of Alkenes) to study more advanced Organic Chemistry and integrated problem solving, aiming for High Honor & Camp in the USNCO National Exam 2026.
Preparing for USNCO 2026?
Choose the path that fits you best:
1. Take Live Lessons with Dr. Chen – weekly class from late Aug to early Apr
- Taking AP Chemistry in the fall --> Level 2
- Completed AP Chemistry --> Level 3
- Aiming for Winning National --> Level 4
- Not sure which Level? --> take the diagnostic test
2. Prefer to begin right away? – Self-paced
Purchase recordings and class materials for Level 2, 3, or 4 and Summer Organic Chemistry in 2024-25 and start learning at your own pace!